EP0951379B1 - Verfahren und vorrichtung zur herstellung einer mehrschichtigen flächigen polymermembran - Google Patents
Verfahren und vorrichtung zur herstellung einer mehrschichtigen flächigen polymermembran Download PDFInfo
- Publication number
- EP0951379B1 EP0951379B1 EP98903990A EP98903990A EP0951379B1 EP 0951379 B1 EP0951379 B1 EP 0951379B1 EP 98903990 A EP98903990 A EP 98903990A EP 98903990 A EP98903990 A EP 98903990A EP 0951379 B1 EP0951379 B1 EP 0951379B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- polymer
- membrane
- slot
- polymer solutions
- extrusion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
- B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/154—Coating solid articles, i.e. non-hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
Definitions
- the invention relates to a method for manufacturing a multilayer flat polymer membrane in which initially a plurality of polymer solutions accordingly the number of layers to be produced, as well as one Device according to the preamble of patent claim 9.
- the task is solved according to the method in that the polymer solutions are subsequently separated into one a slot-shaped extrusion device trained area where the Two-sided polymer solutions also on one flat beams transported in this area are applied, the carrier subsequently with polymer solutions applied on both sides for training the flat polymer membrane through the slit-shaped Extrusion device is conveyed through.
- the advantage of the method according to the invention lies in essential in creating a membrane with which a membrane composite in one operation is created in which a carrier, for example is a fleece, a woven fabric or a knitted fabric, by both Sides can be loaded with the polymer solution, so that at the end of the manufacturing process including of the strength of the membrane composite in essential manufacturing carrier a polymer membrane is created in which the carrier in the membrane composite is integrated.
- a carrier for example is a fleece, a woven fabric or a knitted fabric
- the extrusion device is advantageously used emerging polymer membrane in a coagulation medium passed, it is advantageously possible to conduct the process so that a wet extrusion process is possible, in which the emerging polymer membrane immersed directly in the coagulation medium. in principle is another advantageous procedure so possible that in the manner of a dry-wet extrusion process the polymer membrane only after passing through a certain evaporation distance in a gaseous Atmosphere immersed in a liquid coagulation medium becomes.
- the carrier for example a Fabrics in the form of a fleece, a net, a film, a filter or any other suitable fabric or knitted fabric may be present impregnation with polymer solution. This will, for example, improve the Adhesion of the polymer solution layers or the polymer layers for targeted influence on the structure formation at the interface between polymer solution and Carrier reached.
- a suitable impregnating agent is preferably one Liquid or liquids are suitable, the solvents for the polymers forming the polymer layers are or liquids, preferably with the Polymer solutions chemically and / or physico-chemically react.
- a device for producing a multilayer flat element comprising an extrusion tool with a plurality of feed channels for the layers as well a slot-shaped extrusion die, wherein in an area before entering the extrusion die slit-shaped feed opening for feeding a Carrier opens on the two sides of the carrier the layers fed from the feed channels can be applied are known from JP-A-60 076323.
- the known device is constructed in such a way that a plurality of molten resins are multi-layered flat body can be produced.
- the well-known Device includes an extrusion die with a A plurality of feed channels for the melted Resins and a slot-shaped extrusion nozzle. In the area before entering the extrusion die opens a slot-shaped feed opening for the Feeding a carrier onto which of its two Carrier sides fed from the feed channels molten resins can be applied.
- the multilayer element be a Polymer membrane is made up of a plurality of polymer solutions made according to the number of layers with which the procedure according to one or several of claims 1 to 9 can be carried out, and that the feed channels in which the polymer solutions are fed, slit-shaped to the extrusion die narrow to the area, with the supplied Polymer solutions and the carrier before passing through the Extrusion nozzle can be formed in the form of a composite.
- the advantage of the device according to the invention is essential in that with this in a simple manner continuously producing a flat, as Composite membrane made of at least one on both sides Carrier attached or applied polymer layers existing flat polymer membrane is possible, wherein also the polymer solutions using this device evenly one above the other and even side by side are layerable, and the device also allows one side and the other side, on which the coating or the application of the polymer solution
- the polymer solutions are carried out on the sheet-like support can be composed differently. Which differ in terms of their composition trained polymer layers can be specially designed for the Intended purpose.
- the structure of the Device needs for different polymer solutions basically not to be changed.
- the speed, with which the carrier through the slit-shaped Feed opening to the application area is promoted is adjustable so that the specific thickness of each Polymer layer and the degree of the desired bond adjustable between the polymer layer and the support are.
- Determining the thickness of the device formable multilayer flat polymer membrane is also the opening cross section of the extrusion die, preferably the opening cross section of the slot-shaped Extrusion die at least in relation to the Slot height is adjustable.
- the device according to the invention essentially consists from an extrusion die 11, which in the described here Example two slit-shaped to one slit-shaped extrusion nozzle 12 narrowing Has feed channels 13, 14 for the polymer solutions.
- the polymer solutions, the identical or different composition can have, via the feed openings 19, 20 of the Device 10 supplied from the outside, the pressure is selectable and adjustable. Which becomes the slit-shaped trained extrusion nozzle 12 narrowing feed channels 13, 14 open into an area 15 inside the Device 10 before entering the extrusion die 12th
- a flat Formed slot through which a carrier, the from a fleece, a fabric, a grid or one Knitted fabric or the like can be supplied.
- the feed opening 16 for the sheet-like carrier also flows into the pre-listed area or Order area 15.
- the area or order area 15 formed composite of polymer layers and carrier what will be described in more detail below in the direction of transport of the carrier, see arrow 21, the device 10 over a covering this exit area Extrusion tool 11.
- the extrusion tool 11 has a longitudinal slit, see also FIG. 2.
- the slot height 18 determines, among other things, the thickness of the composite formed within the device 10 from polymer layers and carrier or the thickness of the Extrusion die leaving polymer membrane.
- a plurality can also be used of supply channels can be arranged side by side, with what for the production of large area polymer membranes for an even distribution or an even one Application of the polymer solutions on the carrier above and below, i.e. on both sides, is taken into account.
- the process for producing the polymer membrane can by means of the device 10 described above be carried out.
- polymer solutions are preferred in a common solvent or Solvent mixture produced, for example Have polymer concentrations of 10 to 50% by mass.
- the polymer solutions can subsequently be filtered and be degassed.
- the polymer solutions Device 10 fed via the feeders 19 and 20 and get into the feed channels 13 and 14.
- the application area 15 in the device are the polymer solutions to one also in the application area 15 Carrier supplied via the feed opening 16 on both sides applied and while transporting the Carrier in the direction of arrow 21 through the extrusion nozzle 12 out and are there either in the membrane exit direction 17, which is normally the direction of transport 21 corresponds to discharged from the device 10.
- the extrusion die leaving polymer membrane at an angle from 0 ° to 80 ° relative to the diaphragm exit direction is subtracted.
- finished polymer membrane emerging from the extrusion die 12 direct into a coagulation medium or only after passing through an evaporation section initiate depends on the chosen process from.
- all non-membrane forming Components of the polymer membrane and the coagulation bath by washing or extracting the polymer membrane formed removed, possibly also one subsequent processing of the polymer membrane with post-treatment processes such as preparation, drying, etc. is possible.
- All liquids, liquid mixtures or solutions which have a precipitation point ⁇ of less than or equal to 0.5 can be used as coagulants.
- water, mixtures of water and alcohols, water and solvents (mixture) or mixtures of water, alcohol and solvents (mixture) are preferably used.
- the use of the device 10 according to the invention enables the production of composite membranes in one continuous process in one process step both after a wet extrusion process (multi-component wide slot die plunges directly into the coagulation medium a) as well as after a dry-wet extrusion process (the composite consisting of the first polymer solution, sheet-like carrier and second polymer solution only after passing through a certain evaporation distance in a gaseous atmosphere in the liquid coagulation medium ) Submerged.
- a wet extrusion process multi-component wide slot die plunges directly into the coagulation medium a
- a dry-wet extrusion process the composite consisting of the first polymer solution, sheet-like carrier and second polymer solution only after passing through a certain evaporation distance in a gaseous atmosphere in the liquid coagulation medium
- the resulting membrane was characterized at a transmembrane pressure of 0.5 bar.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Manufacture Of Macromolecular Shaped Articles (AREA)
Description
- Fig. 1
- in der Seitenansicht eine Extrusionseinrichtung im Schnitt entlang der Linie A - B von Fig. 2 und
- Fig. 2
- eine Ansicht auf die Darstellung der Extrusionseinrichtung gemäß Fig. 1 von hinten.
- vAbzug -
- Abzugsgeschwindigkeit [cm/s]
- VPLA -
- Volumenstrom der Polymerlösung A [cm3/s]
- VPLB -
- Volumenstrom der Polymerlösung B [cm3/s]
- BD -
- Breite des Düsenschlitzes [cm]
- DD -
- Höhe des Düsenschlitzes [cm]
- DFG -
- Dicke des Flächengebildes, Vlies, Filter, Netz, Folie o.a. [cm]
- ∈ -
- Volumenporosität des Flächengebildes, Vlies, Filter, Netz, Folie o.a.
- vAbzug -
- 4 [cm/s]
- VPLA -
- 1,2 [cm3/s]
- VPLB -
- 1,2 [cm3/s]
- BD -
- 20,0 [cm]
- DD -
- 0,05 [cm]
- Wasserpermeabilität -
- 54,5 [l/hm2]
- Mittlerer Porendurchmesser -
- 3,1 [nm]
- Porendurchmesser Cut off -
- 9,6 [nm]
- Porendichte -
- 2,6 * 1010 [Anzahl/cm2]
- Oberflächenporosität -
- 1,9 * 10-3
- Relativer Leistungsparameter (Tweddle) -
- 1,4 * 1023 [m-3]
- 10
- Vorrichtung
- 11
- Extrusionswerkzeug
- 12
- Extrusionsdüse
- 13
- Zufuhrkanal
- 14
- Zufuhrkanal
- 15
- Bereich / Aufbringbereich
- 16
- Zufuhröffnung
- 17
- Membranaustrittrichtung
- 18
- Schlitzhöhe
- 19
- Zuführung
- 20
- Zuführung
- 21
- Pfeil (Transportrichtung)
Claims (14)
- Verfahren zur Herstellung einer mehrschichtigen flächigen Polymermembran, bei dem zunächst eine Mehrzahl von Polymerlösungen entsprechend der Anzahl der Schichten hergestellt werden, dadurch gekennzeichnet, daß die Polymerlösungen nachfolgend getrennt zu einem vor einer schlitzförmig ausgebildeten Extrusionseinrichtung ausgebildeten Bereich transportiert werden, wo die Polymerlösungen beidseitig flächig auf einen ebenfalls in diesen Bereich transportierten flächigen Träger aufgebracht werden, wobei nachfolgend der Träger mit den beidseitig aufgebrachten Polymerlösungen zur Ausbildung der flächigen Polymermembran durch die schlitzförmige Extrusionseinrichtung hindurchgefördert wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die aus der Extrusionseinrichtung austretende Polymermembran in ein Koagulationsmedium geleitet wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die aus der Extrusionseinrichtung austretende Polymermembran vor Eintritt in ein Koagulationsmedium längs einer Abdunststrecke geführt wird.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß nachfolgend alle nichtmembranbildenden Bestandteile durch Waschen und/oder Extraktion entfernt werden.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die Polymermembran mittels Präparation und/oder Trocknung nachbehandelt wird.
- Verfahren nach einem oder mehreren der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Träger vor Aufbringung der Polymerlösungen imprägniert wird.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß das Imprägnierungsmittel ein Lösungsmittel für die die Schichten der Polymermembran bildenden Polymere ist.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß das Imprägnierungsmittel ein Medium ist, das mit den Polymerlösungen chemisch und/oder physiko-chemisch reagiert.
- Vorrichtung zur Herstellung eines mehrschichtigen flächigen Elements, umfassend ein Extrusionswerkzeug (10) mit einer Mehrzahl von Zufuhrkanälen (13, 14) für die Schichten sowie eine schlitzförmig ausgebildete Extrusionsdüse (12), wobei in einen Bereich (15) vor Eintritt in die Extrusionsdüse (12) eine schlitzförmige Zufuhröffnung (16) für die Zufuhr eines Trägers mündet, auf den von seinen beiden Trägerseiten die von den Zufuhrkanälen (13, 14) zugeführten Schichten aufbringbar sind, dadurch gekennzeichnet, daß das mehrschichtige Element eine Polymermembran ist, die aus einer Mehrzahl von Polymerlösungen entsprechend der Anzahl der Schichten hergestellt wird, mit der auch das Verfahren nach einem oder mehreren der Ansprüche 1 bis 9 ausgeführt werden kann und daß die Zufuhrkanäle (13, 14), in denen die Polymerlösungen zugeführt werden, sich schlitzförmig zu der Extrusionsdüse (12) zu dem Bereich (15) verengen, wobei die zugeführten Polymerlösungen und der Träger vor Durchtritt durch die Extrusionsdüse (12) in Form eines Verbundes ausbildbar sind.
- Vorrichtung nach Anspruch 9, dadurch gekennzeichnet, daß eine Mehrzahl von Zufuhrkanälen (13, 14) nebeneinander angeordnet ist.
- Vorrichtung nach einem oder beiden der Ansprüche 9 oder 10, dadurch gekennzeichnet, daß die die Extrusionsdüse (12) verlassende Polymermembran unter einem Winkelbereich von 0° bis 80° relativ zur Membranaustrittsrichtung (17) aus der Extrusionsdüse (12) abziehbar ist.
- Vorrichtung nach einem oder mehreren der Ansprüche 9 bis 11, dadurch gekennzeichnet, daß der Druck, mit dem die Polymerlösung durch den Zufuhrkanal (13, 14) zum Aufbringbereich (15) gefördert wird, einstellbar ist.
- Vorrichtung nach einem oder mehreren der Ansprüche 9 bis 12, dadurch gekennzeichnet, daß die Geschwindigkeit, mit der der Träger durch die schlitzförmige Zufuhröffnung (16) zum Aufbringbereich (15) gefördert wird, einstellbar ist.
- Vorrichtung nach einem oder mehreren der Ansprüche 9 bis 13, dadurch gekennzeichnet, daß der Öffnungsquerschnitt der schlitzförmigen Extrusionsdüse (12) in bezug auf die Schlitzhöhe (18) einstellbar ist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19700232A DE19700232A1 (de) | 1997-01-07 | 1997-01-07 | Verfahren und Vorrichtung zur Herstellung einer mehrschichtigen flächigen Polymermembran |
DE19700232 | 1997-01-07 | ||
PCT/DE1998/000005 WO1998030379A1 (de) | 1997-01-07 | 1998-01-05 | Verfahren und vorrichtung zur herstellung einer mehrschichtigen flächigen polymermembran |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0951379A1 EP0951379A1 (de) | 1999-10-27 |
EP0951379B1 true EP0951379B1 (de) | 2003-11-19 |
Family
ID=7816877
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98903990A Expired - Lifetime EP0951379B1 (de) | 1997-01-07 | 1998-01-05 | Verfahren und vorrichtung zur herstellung einer mehrschichtigen flächigen polymermembran |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0951379B1 (de) |
AT (1) | ATE254530T1 (de) |
DE (2) | DE19700232A1 (de) |
WO (1) | WO1998030379A1 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6264044B1 (en) | 1997-04-11 | 2001-07-24 | Cuno, Inc. | Reinforced, three zone microporous membrane |
US6280791B1 (en) | 1997-04-11 | 2001-08-28 | Cuno, Inc. | Process of making a three-region reinforced microporous filtration membrane |
US6413070B1 (en) | 1997-04-11 | 2002-07-02 | Cuno Incorporated | System for manufacturing reinforced three-zone microporous membrane |
US6090441A (en) * | 1998-03-18 | 2000-07-18 | Cuno, Inc. | Process of making reinforced, three zone microporous membrane |
US7229665B2 (en) | 2001-05-22 | 2007-06-12 | Millipore Corporation | Process of forming multilayered structures |
DE10054591A1 (de) * | 2000-11-03 | 2002-06-06 | Geesthacht Gkss Forschung | Vorrichtung zur Herstellung einer Polymermembran |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE538663A (de) * | 1954-06-25 | |||
US3620775A (en) * | 1968-08-12 | 1971-11-16 | Tee Pak Inc | Edible collagen casing |
DD138938A1 (de) * | 1978-09-20 | 1979-12-05 | Volker Groebe | Verfahren zur herstellung von asymmetrischen polymermembranen |
JPS56126407A (en) * | 1980-03-10 | 1981-10-03 | Nitto Electric Ind Co Ltd | Production of semipermeable membrane |
US4669965A (en) * | 1983-09-08 | 1987-06-02 | Kabushiki Kaisha Plastic Kogaku Kenkyusho | Multi-layer extrusion die |
JPS6076323A (ja) * | 1983-10-01 | 1985-04-30 | Dainippon Printing Co Ltd | シ−ト状積層体の製造方法 |
US4963304A (en) * | 1988-09-26 | 1990-10-16 | The Dow Chemical Company | Process for preparing microporous membranes |
US4874568A (en) * | 1988-09-26 | 1989-10-17 | The Dow Chemical Company | Process of making a porous membrane |
CH679761A5 (de) * | 1989-10-02 | 1992-04-15 | Sarna Patent & Lizenz Ag | |
JPH03180316A (ja) * | 1989-12-11 | 1991-08-06 | Hashimoto Forming Ind Co Ltd | 押出成形方法および装置 |
DE4235101C2 (de) * | 1992-10-17 | 1994-11-10 | Krupp Bellaform Maschbau | Verfahren und Spritzkopf zum Herstellen und/oder Umhüllen von Strangprofilen |
-
1997
- 1997-01-07 DE DE19700232A patent/DE19700232A1/de not_active Ceased
-
1998
- 1998-01-05 AT AT98903990T patent/ATE254530T1/de not_active IP Right Cessation
- 1998-01-05 DE DE59810218T patent/DE59810218D1/de not_active Expired - Fee Related
- 1998-01-05 EP EP98903990A patent/EP0951379B1/de not_active Expired - Lifetime
- 1998-01-05 WO PCT/DE1998/000005 patent/WO1998030379A1/de active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DE59810218D1 (de) | 2003-12-24 |
WO1998030379A1 (de) | 1998-07-16 |
ATE254530T1 (de) | 2003-12-15 |
EP0951379A1 (de) | 1999-10-27 |
DE19700232A1 (de) | 1998-07-09 |
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